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Frequency and temperature dependence of the electrical conductivity of KTaO3; Li and PbTiO3; La, Cu: Indication of a low temperature polaron mechanism

hal.structure.identifierJozef Stefan Institute [Ljubljana] [IJS]
dc.contributor.authorLEVSTIK, A.
hal.structure.identifierJozef Stefan Institute [Ljubljana] [IJS]
dc.contributor.authorFILIPIC, C.
hal.structure.identifierLaboratoire de Physique de l'Université de Bourgogne [LPUB]
dc.contributor.authorBIDAULT, Olivier
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMAGLIONE, Mario
dc.date.issued2008
dc.identifier.issn0921-4526
dc.description.abstractEnRecently, the concept of polarons has again been at the focus of solid-state research, as it can constitute the basis for understanding the high-temperature superconductivity or the colossal magnetoresistance of materials. More than a decade ago there were some indications that polarons play an important role in explaining low temperature maxima in imaginary part of the dielectric constant ε″(T) in ABO3 perovskites. In the present work we report the ac electrical conductivities of KTaO3; Li and PbTiO3; La, Cu and their frequency and temperature dependence. The real part of the complex ac conductivity was found to follow the universal dielectric response σ′∝νs. A detailed theoretical analysis of the temperature dependence of the parameter s revealed that, at low temperatures, the tunnelling of small polarons is the dominating charge transport mechanism in ABO3 perovskites.
dc.language.isoen
dc.publisherElsevier
dc.subject.enLow-field transport
dc.subject.enTunnelling
dc.subject.enPolarons
dc.subject.enTitanates
dc.subject.enTantalates
dc.title.enFrequency and temperature dependence of the electrical conductivity of KTaO3; Li and PbTiO3; La, Cu: Indication of a low temperature polaron mechanism
dc.typeArticle de revue
dc.identifier.doi10.1016/j.physb.2008.06.005
dc.subject.halChimie/Matériaux
bordeaux.journalPhysica B: Condensed Matter
bordeaux.page3608-3611
bordeaux.volume403
bordeaux.issue19-20
bordeaux.peerReviewedoui
hal.identifierhal-00333209
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00333209v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physica%20B:%20Condensed%20Matter&rft.date=2008&rft.volume=403&rft.issue=19-20&rft.spage=3608-3611&rft.epage=3608-3611&rft.eissn=0921-4526&rft.issn=0921-4526&rft.au=LEVSTIK,%20A.&FILIPIC,%20C.&BIDAULT,%20Olivier&MAGLIONE,%20Mario&rft.genre=article


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